Machine for mixing concrete.



No. 869,522. PATENTED OUT. 29. 1907.

e. D. SOHEIFFLER.

MACHINE FOR MIXING CONCRETE. APPLIOATION FILED SEPT. 20. 1908.

5 SHEETS-SHEET 1 No. 869,522. PATENTED OCT. 29. 1907.

G. 1). SOHEIFPLER.

MACHINE FOR MIXING CONCRETE. APPLICATION FILED SEPT. 20. 1906.

5 SHEETS-SHEET 2.

after/11m No. 869,522. PATENTED OCT. 29, 1907. G. D. SUHEIPFLER. MACHINE FOR MIXING CONCRETE.

APPLICATION FILED SEPT. 20, 1900.

5 SHEETS-SHEET 3.

q/vihwooc 3 MM 042L554, W. m

PATENTED OUT. 29. 1907. G. D. SCHEIPFLER. I MACHINE FOR MIXING CONCRETE.

APPLICATION FILED B'EPT.20,1908.

5 SHEBTSSHBET 4.

witnesses No. 869,522. 7 PATENTED OCT. 29, 1907. G. D. SGHEIFPLER.

MACHINE FOR MIXING CONCRETE. APPLICATION FILED SEPT.20,1906.

5 SHEETSSHEET 5.

TEES ilfl'iflilliENlil.

GEORGE I). scllltlil l lililt, O1 JACKSON, MICHIGAN.

MACHINE FOR MIXING CONCRETE.

Specification of Letters Patent.

Patented Oct. 29, 1907.

application tile' Septeinher Zlhlilllti. Serial K03351426- To all whom it may eonecrn:

Beit known that 1, ("1 noun 1:. l). Seuinr'r'nuu, a eiti Zen oi the United States of .\u\eriea. residing at [lat-kson, in the County of Jaeksou and State of .\liehi 'an, have invented eertai'u new and useful lmprovenn-uts in Machines for Mixing tonereto; and 1 do hereby declare the following to be a full, elear, and exaet description oi the invention, sueh as will enable'others skilled in the art to which it apperlains to make and use the same.

My invention relates to improvements in maehines for mixing Concrete, and its objeel is to provide the device with various new and useful features hereinafter more fully deseribed and partienlarly pointed out in the claims, reierenee being bad to the .u-wmpanying drawings, in which:

Figure 1.. is a side elevation of a maehino embodying my invention; Fig. 2. a ltnigiludiual vertieal soetion oi the same on the line 1 2 of Figs. 1- ;uid -'l: hi

"e vertical seet'ion on the line 23' 21 of l" g l, 2 and'o; Fig. 4. the same on the line 4 l of Figs l, l and 5; Fig. 5. a plan view of the same; Fig. l; a seelioual detail showing means for'-.nljnsl.ing the ease 4; Fig. I.

it. it

an enlarged detail of one of the spiral eonveyer brushes;

and, Fig. 8 the same of one of the hopper brushes.

Like numbers refer to like parts in all of the lignres. 1 represents the hopper to the feed lueelianisui. 2 the eoneave bottom of the same to reeeive the various ingredients from the feed ineehanisin; 2' cylinder (tonstitinting the ease of the dry mixer; t the stationary ease of the wet mixer, the sannbeing semi eylindrieal below the axis and having vertiea sides a rotaliue above the axis and open at. the top. 5 is a w-iler tank to 1 supply water to the wet mixer through a sprinkler Ill atlaehed thereto and arranged above the revolving end of the wet mixer; (3 represents the main shaft rotated by any eouvenient means preferably by a easolene engine (not shown) mounted on the f rward end of the frame whieh is broken away and not. shown.

7 is a eounlershaft rotated by gears R and 5 eonneeting it with the shaft. t3. 'lo rotate the eylinder 22 it is provided with a gear l surroutuling said evlinder and engaged by a pinion ll on the shaft 7.

l2 and II, are sproeket. wheels on the shaft 7. whieh wheels l are ('onu eted by ehains l2 and lit to like wheels rot-alive. and slidable on shafts H at the. respeetive sides of the maehiue. On eaeh of said shafts l-l are also mounted two winding druins l7 spat-ed apart at eaeh side of the hopper l and eaeh drum nearest the wheel is detaehably eonneet ed thereto by a eluteh 'lli engaged and disengaged by sliding the wheel on the shaft by means of a bell erank lever 22, the huh ot' the wheel by the' usual forked end, and moved by a lever 21 pivoted to the hopper and extending to near the top of the same.

eouneeted to .liuekels 23 are provided at eaeh side of the machine for hoisting the material and dumping the same into the hopper. 'lhese buel-zets are provided with arms Bl at their opposite sides whit-h engage and traverse slotted guides eurved inward at the top and terminating above the hopper. Arms '20 extend upward and inward from the guides on the upper ends of which arms are jourualed pulleys 19 engaged by hoisting eables lb all-aehed to the buckets at. one end and wound on the drum l7 at the other end.

On eaeh bueket is a lug it?) to engage and move the lever ll inward and disengage the eluteh it; when the but-hot has been turned to dumping position by engageuu-nt of the guide arms 21 with the upper ends of To prevent too rapid fall of tlnbnekels after the elutehes are released, 1 provide a brake lever it to frietionally engage a drum 17 on eaeh shaft and an adjustable weight it) to operate the lever. The weight. may be dispensed with however. and the brake manually operated if preferred.

The hopper is divided into three parts by partitions :i'l whieh extend from the top of the hopper downward about half-way lo the bottom thereof. These partitions are spat-ed apart at eaeb side of the middle of the hop per and eonverge downward terminating in two opposlhe slots in the guides 20.

log eonea vesin': eoueentrie with the axisof ashait 2o journaled in the hopper. 'lhese eoin 'a\'es extend through ares of about til degrees, thus leaving top and bottom openings tberebetween of about the same extent. On this shaft is a spider litl having four etpii(listaiit radial wings to eaeh of whieh is seeured a brush -10 projecting radially and traversing at its outer and flexible end elose to the eoneaves These brushes are made prefer abl of llat strips of steel stiff enough to support and more the eement, whieh is plaeed in the hopper between these partitions ii-l, and at the same time sntlieienlly yielding to permit an small solid subslanees sneh as nails or small stones to pass without breaking or stalling the deviee. In the opposite walls of the hopper are also formed eoueaves 36 of substantially 90 degrees and in the axis of eaeh eoneave is jonrnaled the respeetive shafts25 and IT, on eat-h of whieh is mounted a spider kill and brushes -ltl as deseribed on the shaft. 26. eubslant ialli' opposite the upper edges of the eoneaves lit; and elose to the path of the outer ends of the brushes on the shafts 25 and 27 are brushes 38, arranged radially to the shafts, and eaeh pivotally attached to the lower edge of an lllt'li l1((l shelf 37 adjnslably attached to the partition 2H. 'lhese brushes are yieldingly held in plaee by springs ll engaging the brush atone end and the shelf 2:7 at the other end. Within eaeh spring is a rod 43 enrved eoneentrie with the pivot of the brush, being attaehed to the brush atone end and movable in an opening in the shelf at'the other end. A head on this rod engages the shelf and limits the movement of r to prevent adhesion thereof to the cylinder.

the brush under pressure of the spring. These brushes are all preferably of flexible steel strips arranged close together, the shelf brushes preferably being made as shown in Fig. 8 by'providing a cast metal head 62 hav ing a dovetail channel therethrough, in which is inserted a block of wood 61, in which block are inserted the 'steel strips 38 of double length and each folded to enter two openings in the block.

in the side compartments of the hopper, the sand and broken stone or gravel is respectively placed by means of the described hoisting device, and the brushes are of sufficient stiffness to hold and move the same and at the same time yield to pass any stones or other obstructions that may be therein without stalling or breaking the machine. Below the feeding devices described, the hopper opens into the semi-cylindrical bottom 2, in the axis of which is the shaft 6 provided with spiral brushes 43 arranged to sweep close to the bottom and move the material along the same and out through the open end hereof, which end is tubular and extends within the receiving end of the rotating cylinder 3, which latter is of greater diameter than the end of the hopper inserted therein.

The spiral brushes on the shaft are of increased radius in this cylinder as at 43" and contact the bottom thereof StilTlClQill to sweep the material along the same and also The discharge end of this cylinder rotates within the receiving end of the case 4, which latter is of greater diameter than the cylinder 3 and the brushes on the shaft are fur ther enlarged radially to contact "and sweep the bottoms of this case at 43*.

The cylinder 3 is supported on flanged rolls 48 journaled on studs 40 horizontally adjustable in slots 50 in the frame, whereby the cylinder may be vertically adjusted, to compensate for the wear of the brushes by moving the studs toward each other, and the case 4 is mounted on saddles 51 provided with vertical slots 52 and adjustably secured to the frame by bolts 53 in the slots, screws 54 in lugs 55 on the frame, serve to engage and vertically adjust the saddles.

The shaft 6 is preferably square and the spiral brushes on thesame are preferably made as illustrated in Fig. 7, with a square hub 56 having a square opening to fit the shaft and when arranged in series thereon, these hubs will shut end to end. Opposing radial arms 57 extend from each hub and support hollow segments 58 arranged concentric with the axis of the hub and as shown are substantially 90 degrees in length but may be shorter leaving spaces therebetwcen, and will operate as well when thus made. These segments have peripheral slots to receive the'l'irushes 59, which brushes are preferably of flexible strips of steel and arranged close together and extending radially, and may be of a-single layer as shown, or two or more overlapping layers, as preferred. These brushes at their inner ends engage an angle or groove of the interior of the segments and are secured in place by casting soft metal around the same and t tling the interior of the segments therewith. The

brushes mounted on the spiders of the feeding mechanism are also made with hollow members having flexible steel brushes inserted therein and secured the same as described for the spiral brushes, but are straight instead of spiral.

Each of the shafts 25, 26 and 27 is intermittently r0 tated one-fourth of a revolution, and in the direction of the arrows, and the frequency of the movement of each is determined as follows: On the shaft 25 is fixed four equal and equi-distant radial arms 28 having rolls journaled in their outer ends. The shaft 26 is also provided with the same as at 29. The same is also provided for the shaft 27 as at 30, but to reverse the direction of rotation of this shaft, these arms are journaled on a stud 27 and connected to the shaft 27 by equal spur gears 46, which gears are protected by a casing 47 to keep sand and gravel therefrom. The arms for each shaft rotate in separate planes and equidistant from the axis of the rotating cylinder 3, in which cylinder are inserted radial pins 31 in the respective planes .of the respective sets of arms, whereby each several series of pins will successively engagethe respective arms and no others. By inserting a greater or less number of pins in the respective series of'openihgsfor the same, the frequency of movement of the respective feeding mechanisms will be determined and thus the prop rtions of the respective ingredients determined. These pins are curved backward which prevents them from turning out of their screw-threaded sockets and also adapts them to engage the rolls, the same as gear teeth would engage the same. To further secure the pins in place, they are provided with. jam nuts,'not

numbered.

In operation the material is placed in the buckets and hoisted, being automatically dumped into therespective side compartments of the hopper. The sacks of cement are manually emptied into the middle com: partments. The feed of the different ingredients is determined by the number of pins in the respective series around the cylinder, each feeder being turned intermittently one-fourth of a revolution by each pin its respective row and stops in the position shown in the drawing. The cylinder3 and spiral brush therein turn at different ratesof speed whereby the material in. the dry state is very thoroughly mixed before entering the wet mixer and the brush engages the inner surface of the cylinder and removes the adhering material therefrom. It therein receives the proper quantity of water from the sprinkler 32 and is again thoroughl y stirred by the brushes in the case 4, whereby the water is evenly incorporated therewith, being finally discharged at the open rear end of the case 4. The brushes beingjlexible and contacting the cylinder and case, clear the same from adhering material, thoroughly mix the same and convey it axially along the hopper bottom, the cylinder 3 and the case 4 and finally discharge it from the open end of the latter.

I do not herein claim the specific feed regulator,

hoisting apparatus, or brushes described, but reserve the. same for separate applications in accordance with the requirement of the office for division of this ap plication.

\Vhat I claim is:

1. in a concrete mixer, the combination of a case having an imperiorate concave bottom, an irnperforate rotative r-yiimiur communicating end to end with the case, a rotative brush in the case and cylinder and contacting the in neisurfaces of each of the same, and means for rotating the brush and the cylinder at different relative speeds.

.Z. in a concrete mixer, the combination of a rotative cylinder, a stationary ease in communication with the cylimir-r. n rotative brush in the cylinder and case and engaging the inner surface of the same, means for rotating the brush and cylinder atdiiferent relative speeds, means for supplying dry materialto the cylinder, and means for supplying water to the case.

3. In a concrete mixer, the combination of a hopper having a concave bottomfa rotative cylinder communicatingwith the hopper at one end, a stationary casecommunieating with the cylinder and having a concave bottom, a shaft extending through' the axis of the hopper, the axis of the-cylinder and the axis of the case, and a spiral memher on the shaft, said member having a flexible periphery engaging'the bottom of the hopper, the interior of the cylinder, and the bottom of the case, and means for rotating the shaft and cylinder.

4. in a concrete mixer, the combination of a stationary case having a concave bottom, a rotative cylinder having one end inserted in one end of the case, a hopper having a concavebottom, and also having a discharge extension insorted in one endot the rotatlve cylinder, a shaft in the axis of the hopper, the axis of the cylinder and the axis of the case, a spiral brush on the shaft and engaging the inner surfaces of the hopper, the cylinder and the case, feed regulating mechanism in the hopper, means for supplying water to the case, and means for rotating the cylinder and the shaft at different relative speeds.

in a concrete mixer, the combination of a hopper hav ing a concave bottom and a tubular discharge extension, a rotative cylinder havim, one end surrounding said extension, at casehaving one end surrounding the other end 01' said cylinder, means for vertically adjusting the cylinder and the axis of the case, a spiral member on the shaft and having a ilexible periphery engaging the bottom 01 the hopper the interior of the cylinder and the bottom of the case, and means for rotating the shaft and cylinder at iiiiforent relative speeds.

I ii. in a concrete mixer, the combination of a hopper, a feed regulator in the hopper, radial arms on the feed regulator shaft and outside of the. hopper, a rotative mixing cylinder communicating with the hopper, and a series of detachable pins in the cylinder to engage the arms and operate the feed regulator said pins being variable in number to change the rate of operation oi the feed regulator.

7. in a concrete mixer, the combination of a hopper divliicd into separate compartments, a feed regulator in each of the compartmonis. a series of radial arms on each regulator shaft and outside of the hopper, each series of arms rotating in a different plane, a rotative mixing cylinder communicating with the hopper, and a separate series of pins in the cylinder for each feed regulator and engaging the radial arms thereof.

8. In a concrete mixer, the combination of a main shaft having a spiral brush thereon, a hopper having a concave bottom beneath the brush, a rotative cylinder, a gear surrounding the cylinder, a counter-shaft geared to the main shaft and driven thereby, a pinion on the counter-shaft and engaging the gear on the cylinder, rolls supporting the cylinder, a. feed regulator in the hopper and having radial arms,.and a series of pins in the cylinder to engage the arms and operate the feed regulator.

- i). In a concrete mixer, a hopper having a concave bottom, 8. feed regulator in the hopper, a rotative mixing cyl-- inder communicating with the hopper, radial arms on the feed regulator shaft and outside of the hopper, detachable and rearwardiy curved pins in the cylinder and engaging the arms to operate the feeder, and means for rotating the cylinder.

10. In a concrete mixer, the combinntionot a rotative mixing cylinder, a hopper communicating with the cylinder, a feed regulator in the hopper and having radial arms outside the hopper, pins in the cylinder to engage the arms and operate the feeder, a rotatlve mixer in the cylinder, and a countershai't geared to the rotative mixer, and also geared to the cylinder to rotate each at different relative speeds.

11. In a concrete mixer, the combination of a hopper having upper compartments and a concave bottom, a. rotative cylinder, a stationary case, the hopper ,bot'tom the cylinder and the case being arranged in axial alinement and communicating in series, a shaft in the axis of the same, a spiral brush on said shaft, a feed regulator in each compartment oi the hopper, means for supplying water to the case. a counter-shaft geared to thebrush shaft,

. gears connecting the counter-shaft and the cylinder, and

' ononen D. SCHEIFFLER.

Witnesses l'iu'runu V..MOULTON, Gaononma (times.- 

